| Acknowledgements | 第1-5页 |
| Abstract in Chinese | 第5-8页 |
| Abstract in English | 第8-14页 |
| 1. Introduction | 第14-18页 |
| ·Origins of the research | 第14页 |
| ·Research background | 第14-17页 |
| ·Research questions | 第17-18页 |
| 2. Literature Review | 第18-26页 |
| ·Turn-taking rules and interruption | 第18-19页 |
| ·Relevant studies about interruption in English-speaking countries | 第19-20页 |
| ·Relevant studies about interruption in China | 第20-22页 |
| ·Interruption with overlap and turn-bidding | 第22-25页 |
| ·Interruption and overlap | 第22-24页 |
| ·Interruption and turn-bidding | 第24-25页 |
| ·Different definitions of interruption | 第25-26页 |
| 3. Research Methods | 第26-34页 |
| ·Subject selection | 第26页 |
| ·Data collection and transcription | 第26-27页 |
| ·Classification of interruptions | 第27-34页 |
| ·Classification of interruptions in previous studies | 第27-29页 |
| ·Classification of interruptions in this study | 第29-34页 |
| 4. Data Analysis and Findings | 第34-42页 |
| ·Statistic results of classification of interruptions | 第34-38页 |
| ·Data analysis | 第38-40页 |
| ·Findings | 第40-42页 |
| 5. Discussions | 第42-52页 |
| ·The contextual factors leading to classroom interruptions | 第42-48页 |
| ·The necessity of the contextual dimension in interruption research | 第42-44页 |
| ·The contextual factors concerning teachers' being interrupted | 第44-46页 |
| ·The contextual factors concerning students' being interrupted | 第46-48页 |
| ·Functions of classroom interruptions | 第48-52页 |
| ·Positive functions | 第48-50页 |
| ·Negative functions | 第50-52页 |
| 6. Implications | 第52-55页 |
| 7. Conclusion | 第55-57页 |
| Bibliography | 第57-60页 |
| Appendix 1 A Sample of Transcriptions | 第60-76页 |
| Appendix 2 Transcription Conventions | 第76-77页 |
| Appendix 3 Figures and Tables | 第77页 |
